Attachment for lathes



D.P.FONTANA ATTACHMENT FOR LATHES Filed Afiril 6, 1922 2 Sheets-Sheet 1 INVENTOH ATTORNEYS 2 Sheets-Sheet 2 IIWENTOR D. P. FONTANA ATTACHMENT FOR LATHES Filed April 6, 1922 Aug. 7, H923.

ATTORNEYS Patented Aug. 7, 1923.

Ldtlsllt nonnnroo 1-. nonTAnA, on NEW YORK, n. Y.

' ATTACHMENT ron LATHEs.

Application filed' April 6,

To all whom it may concern:

Be it known that I, DoMnNioo P.'FON- TANA, a subject of the King of Italy, and a resident of the city of New York, borough of Manhattan, in the county of New York and State of New York, have invented a new and Improved Attachment for Lathes, of which the following is a full, clear, and exact description. I

This invention has relation to an improve ment in lathes and refers more particularly to an attachment for metal lathes.

As an object the invention contemplates an attachment which constitutes a positive means for preventing relative movement be tween the .tool rest support and the work to preclude and prevent injury to the operator or spoiling of the work resulting from slippage of the tool rest support.

As a further object the invention contemplates-an attachment of the character described which includes means for compensating for longitudinal and lateral ad ustments of the tool rest support and locking means adapted to coaot therewith for positively retaining the elements in their adjusted positions. p

More specifically the invention contemplates an attachment for lathes for the purpose specified which constitutes a connection between the tool rest support and either the head or tail stock of the lathe whereby an auxiliary means for preventing relative movement between the tool rest support and the work is provided.

As" a still further object the invention contemplates an attachment of the character described which is comparatvely simple in its construction and operation, which is thoroughly reliable and highly efficient in its purpose, and which may be readily installed and employed in connection with standard lathes now in general use.

With the above recited and other objects in View, the invention resides in the novel construction set forth in the following specification, particularly pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that the right is reserved to embodiments other than those actually illustrated herein to the full extent indicated by the general meaning of the terms in which the claims are expressed. I

1922. SeriaI no. 550,070.

In the drawings- Figure 1 is a front elevation of a lathe with parts broken away to disclose the underlying structure, and illustrating the same equipped with anattacliment constructed in accordance with the invention.

Fig. 2 is a plan view thereof.

Fig. 3 is a fragmentary detail view illustrating the attachment shifted for operation in connection with a tail stock.

Fig. 1 is an enlarged horizontal sectional 'rie-w of the attachment taken approximately onth'e line 4- 1 of Fig. 1.

Fig. 5 is a transverse vertical sectional view taken approximately on the line 5-5 of Fig. 4. p

Fig. 6 is aIdetail fragmentary sectional view taken approximately on the line 6-6 of Fig. 5. p Referring to the drawings by characters of reference, A designates the bed plate of a lathe upon which a head stock B and a tail stock C are supported; A tool rest support I) including a base E and an upstanding tubular standard F which receives the shank G of the tool rest H is associated with the bed plate of the lathe in the usual manner for longitudinal and lateral adjustments through the medium of the slotted portion I in the bed plate A and the clamp J which extends through the slotted portion and coacts with the base E. v I

By actual experience it has been found that the clamp J often permits of slippage and consequent relative movement between the tool rest support and'the work, which results in in ury to the'work or the operator. In order to overcome and positively prevent such occurrences, the attachment constituting the invention has been devised. The attachment includes a forwardly or inwardly projecting stud or shaft section 10 i rigidly secured in any desired manner or cast as a part of the tubular standard F upon which a member 11 is mounted, said member consisting of a substantially T- shaped sleeve, the head 12 of which receives the stud or shaft section 10 and the tubular stem 13 of which receives the reduced extremity 14: ofa jack screw 15. The'head and tail stocks B and C are longitudinally tapped as at 16 and 17 to receive the jack screw 15. In order to provide a detachable swiveled connection between the reduced reduced extremity is provided with an annular groove 18 with which the inner extremity of a retaining screw 19 is adapted to cooperate when threaded into the tubular stem 13. The outer free end of the jack screw has formed thereon a, manipulating handle 20 and lock nuts 21 are threaded to the jack screw for engagement with the opposite ends of the tail stock after the proper adjustment of the screw through the tail stock has been obtained. 'The tubular head 12 ofthe member 11 is loosely mounted on the stud or shaft section 10 to permit of the swinging of the member 11 to dispose the tubular stem 13 at either side of the stud or'shaft section 10 and to compensate for lateral or transverse movement of the tool rest supportD. In order to lock and retain the toolrest support D in its lateral adjusted position with respect to the member 11, a retaining screw 22 having a manipulating handle 23, is threaded through the tubular head 12 and respectively at its inner end with the upper and lower notches or depressions 24 and 25 in the stud or shaft section 10.

In use and operation of the device the jack screw 15 is threaded through the tapped or threaded bores 16 or 17 of the head orvtail stock according to the position and arrangement of the tool rest support with respect to the head or tail stocks. Where the tool, rest support is disposed closer to the head stock the jack screw is inserted and threaded through the tapped or threaded bore 16 of the head stop and the member 11 is swung to a position to dispose the tubular stem 13 at the left hand side of the stud or shaft section 10. The reduced extremity 1470f the jack screw is then received by the stem 13 and the retaining screw 19 is manipulated to engage with the annular groove 18 in the reduced extremity 14 to swivelly couple the member 11 with the jack screw. The ac]; screw is then manipulated by means of the handle 20 to obtain the proper longitudinal adjustment of the tool rest support longitudinally of the leg; When the proper longitudinal adjustment has been obtained the lock or jam nuts 21'are threaded against the opposite ends of the head stock and the lateral ad justment of the tool. rest support is obtained.

When the proper lateral adjustment has been accomplished, the retaining screw 22 is manipulated to bring its inner extremity into engagement with the desired notch or depression 25 on the under side of the stud or shaft section 10. In this manner the tool rest support D is positively locked and retained against accidental displacement or relative movement with respect tothe work. It is of course understood that the usual clamping device J will be also manipulated,

cooperates thus doubly assuring the locking of the tool rest support in its ad'usted positions. Where thetool rest support lD-is to be disposed closer to the tail stock C, the jack screw is removed from the head stock B and threaded into the tapped or threaded opening 17 of the tail stock 0'. This is accomplished by unscrewing the retaining screw 19 to withdraw the same from the annular groove 18 of the extension14, releasing the lock or jam nuts 21, removing the inner jam nut 21, removing the jack screw and inserting the same into thetail stock. The retaining screw 22 is then retracted from the depressions or notches 25 on the underside ofthe stud or shaft section 10 and the 11 is swung to the reverse pose the tubular stem 18 at the opposite side member 2 pos tion to disof" the stud or shaft section 10 The re-s taining screw 22 is then manipulated to cause its innerextremity to engage in one ofthe upper series of notches or depressions 24. The reduced extremity 14 is then inserted within the stem 13 and the retaining screw 19 is groove 18. a I It will thus be seen that a comparatively re-engaged with the annular simple and inexpensive attachmenthas been provided for use in connection with lathes to constitute a connection between the tool rest support and the head or tail stocks v which aifords means for positively preventmg accidental slippage or relative movement between thetool rest support and-the work. i

I claim:

1. An attachment for lathes comprising means detachably associated with the head i or tail stock and longitudinallyadjustable" adjustable with respect to of the t neans for detachably coupling" the inner end of the first means with the tool rest support, said tool restsupport being laterally adjustable with respect to the latter 7 means, and means for locking and retaining the tool rest support in its laterally adjust edv positions. v I

3. The combination with. a lathe including ahead and tail stock and a tool rest support,

of means adapted to be selectively associat ed with the head or tail tudinal adjustments with lathe, and means for .detachab y coupling the first means to the tool rest support. v

4. The combination with a lathe including head and tail stocks, and port, of an attachment'therefor constituting stocks for longires ect tothe a tool rest'supmeans for positively locking the tool rest support in adjusted position to prevent rel ative movement between the same and the With the inner end of the jack screw and Work comprising longitudinally threaded having laterally adjustable association With bores in the head and tail stocks, a jack the stud, and means carried by said coupling 10 screw adapted for respective association for locking the stud in its laterally adjusted 5 With said bores, a laterally projecting stud position. I 1 v carried by the tool rest support, a coupling having detachable and svviveled association DOMENICO P. FONTANA. 

